The town of Ermina turns out to be a city for fish, where the whole town is submerged in water during high tide. The moment the party mentions Water God Dragon, the fish turn hostile.
It can of course mean to defeat, 
or to diminish their powers,
Natürlich kann es bedeuten, sie zu töten.
Oder ihre Kräfte auszulöschen.
Acabar con ellos es una.
Claro, pode significar derrotá-los
ou diminuir seus poderes.